21220140310 has 32 divisors (see below), whose sum is σ = 40216946400. Its totient is φ = 8039243520.

The previous prime is 21220140307. The next prime is 21220140317. The reversal of 21220140310 is 1304102212.

It is a super-2 number, since 2×21220140310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220140317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 865906 + ... + 890074.

It is an arithmetic number, because the mean of its divisors is an integer number (1256779575).

Almost surely, 2^21220140310 is an apocalyptic number.

21220140310 is a deficient number, since it is larger than the sum of its proper divisors (18996806090).

21220140310 is a wasteful number, since it uses less digits than its factorization.

21220140310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28816.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21220140310 its reverse (1304102212), we get a palindrome (22524242522).

The spelling of 21220140310 in words is "twenty-one billion, two hundred twenty million, one hundred forty thousand, three hundred ten".